Electronic flash device

Details Electronic flash device Electronic flash device

1982-12-14

1984-09-04

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315173, 315225, H05B 4132

Patent

active

044699905

ABSTRACT:
In an electronic flash device of the type having a power supply unit comprising a low DC power supply and a DC-DC converter and an IC memory which can maintain its stored information even if when a power supply switch is turned off, there are provided a backup capacitor which can maintain the normal and stabilized operation of the IC memory which is connected to the power supply even when the voltage of the power supply drops to such a level that the normal and stabilized operation of the IC memory cannot be maintained; a voltage detecting means for detecting the voltage across the power supply; and a control circuit which responds to the output signal from the voltage detecting means so as to control the operation of the DC-DC converter.

REFERENCES:
patent: 4272806 (1981-06-01), Metzger

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